JPH0122805B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grinding fluid overtreatment device that over-separates metal powder and contaminants from grinding fluids discharged from various machine tools. The purpose is to achieve economical and continuous separation of metal powder and contaminants.

In order to reuse the grinding fluid discharged from machine tools, methods for separating metal powder and contaminants from the grinding fluid include methods that use magnetic separators, cartridge-type filters, and even There are filters that use Betsu type paper filters, but with magnetic separators, it is impossible to separate non-ferrous metals and non-metallic substances, and even iron powder cannot be separated. When the amount is large, the adsorption is often insufficient, and the separation ability is extremely low.

In addition, in the case of cartridge-type filters, when processing highly concentrated contaminants, the over-treatment capacity is quickly lost, making it impossible to achieve continuous separation treatment, that is, over-treatment. At the same time, since it is necessary to frequently replace the filter, the cost required for the filter becomes enormous, making it uneconomical.

Furthermore, in the case of a veterinary paper filter in which a strip of paper is wound in order to be supplied and discharged, the cost of the paper is high because the paper used as the filter is disposable. Since a large amount of grinding oil is impregnated in the grinding fluid and is discharged, the amount of grinding oil consumed also increases.

The present invention was devised to eliminate the drawbacks and dissatisfied points of the above-mentioned conventional examples. The cloth is moved and the desired treatment is applied to the cloth while it is being moved.

An embodiment of the present invention will be described below with reference to the drawings.

The grinding fluid overtreatment device according to the present invention has a tank 1 for storing the grinding fluid U discharged from a machine tool, and a circulating running portion having a running portion located in the grinding fluid U stored in the tank 1. An endless circulation cloth 6 that runs along a path is immersed in the grinding oil U in the tank 1, and the inside is communicated with a suction pump 13 that is a vacuum source, and the upper end opening is always closed by the cloth 6. It has an oil hopper 2 arranged to
A vacuum hopper 8 that exerts a vacuum action from the same side as the oil hopper 2, a pressure roller 9 that applies a pressure force, and a pressure roller 9 that is attached to the cloth 6 in a deoiled state. A scraper 12 for scraping off a cake K consisting of metal powder and pollutants is arranged in this order.

In the illustrated embodiment, the cloth 6 is connected to a plurality of guide rollers 7, pressure rollers 9 and drive rollers 10.
The grinding fluid U stored in the tank 1 runs along an endless circulation path formed by each roller. I'm buried inside.

The oil hopper 2 arranged to be submerged in the grinding oil U stored in the tank 1 includes a box-shaped hopper tank 3 with an open top, and a backup plate 5 disposed at the top opening of the hopper tank 3. and a metal mesh 4 placed on this backup plate 5.

As shown in FIG. 3, the hopper tank 3 has a bottomed cylindrical structure with a low height, and the width of the opening formed on the top surface is set to a value not larger than the width of the cloth 6 described above. has been done.

A back-up plate 5 (see Fig. 2), which is made up of a mechanically strong flat metal plate with a large number of holes, is attached to the top opening of the hopper tank 3. Plate 5
are the metal net 4 placed on this backup plate 5 and the cloth 6 placed on this metal net 4.
This is to prevent oil from deforming and entering into the hopper tank 3, and to always form and maintain a flat running surface of the cloth 6 on the upper surface of the oil hopper 2.

The metal mesh 4 is arranged on the backup plate 5.
(See Figures 2 and 3) is to reduce as much as possible the frictional resistance generated between the oil hopper 2 held immovably and the cloth 6 that moves while traveling, and to This is to make it easier to slip, and is made of, for example, spirally formed steel wire arranged in parallel flatly.

In the illustrated embodiment, the oil hopper 2 has a back-up plate 5 and a metal mesh 4 at its upper opening.
This allows the cloth 6 located at the opening of the oil hopper 2 to maintain its flat shape and to make it slippery; however, negative pressure inside the hopper tank 3 When the grinding fluid U is sucked into the hopper tank 3 by generating a The entire circumference of the end face must be in close contact with the lower surface of the cloth 6. Therefore, the frictional resistance between the hopper tank 3 and the cloth 6 due to the close contact of the upper end face of the hopper tank 3 with the lower surface of the cloth 6 is reduced. Consideration has been given to making the area of the upper end surface of the hopper tank 3 as small as possible so as not to increase the size, thereby minimizing the frictional resistance generated between the hopper tank 3 and the cloth 6.

The cloth 6 is made of a material that has high abrasion resistance and does not undergo elongation and deformation, such as polypropylene resin fiber.

The cloth 6 is moved in a constant direction along a constant endless circulation path formed by being stretched around a plurality of guide rollers 7, a pressure roller 9, and a drive roller 10. A part of the running path of the oil hopper 2 is immersed in the grinding oil U stored in the tank 1, and is positioned on the metal net 4 while covering the entire upper opening of the hopper tank 3 of the oil hopper 2. It's getting old.

A vacuum hopper 8, a pressure roller 9, and a scraper 12 are arranged in order from the upstream side in the running direction of the cloth 6 in the path portion of the cloth 6 located outside the grinding oil U in the tank 1. .

Like the oil hopper 2 described above, the vacuum hopper 8 is connected internally to a suitable vacuum source, and metal powder and contaminants (hereinafter simply referred to as cake K) that have passed through the oil hopper 2 and adhered to the cloth 6 It operates to separate the oil contained in the oil (denoted as ) from the solid matter by vacuum action, and is located on the same side of the cloth 6 as the oil hopper 2 described above.

The pressure roller 9 is used to pressurize the cake K with the cloth 6 to squeeze out the oil contained in the cake K, and in the illustrated embodiment, it is connected to a drive device 11 such as a motor. The tension roller on the downstream side presses the cake K together with the cloth 6 between the rotationally driven drive roller 10 and the cloth 6 is wound over a larger circumferential area. The arrangement of the guide roller 7 which also serves as a guide roller 7 is taken into consideration.

The scraper 12 is for scraping off the cake K from which the oil has been forcibly squeezed out from the surface of the cloth 6 by the action of the pressure roller 9, and in the illustrated embodiment, it is a guide that largely reverses the running direction of the cloth 6. It is arranged at a position facing the roller 7, so that the cake K adhering to the surface of the cloth 6 can be scraped off effectively.

Since the grinding fluid overtreatment device according to the present invention has the above-described configuration, the grinding fluid U, which is the waste oil from the machine tool, supplied into the tank 1 is transferred to the cloth 6 by the negative pressure in the oil hopper 2. It passes through and is sucked into the hopper tank 3, but when passing through the cloth 6, solid-liquid separation is achieved by the action of the cloth 6.

The drained grinding oil U that has been sucked into the hopper tank 3 is directly supplied to the machine tool by the action of the suction pump 13.

On the other hand, the cake K, which is a solid component separated from the oil and attached to the surface of the cloth 6, travels together with the cloth 6 and comes out of the grinding fluid U in the tank 1, and is sent to the vacuum hopper. Solid-liquid separation is achieved to a high degree by the suction action by the roller 8 and the squeezing action by the pressure roller 9, and the cake K from which the oil has been separated is scraped off from the surface of the cloth 6 by the scraper 12 and discharged.

The portion of the cloth 6 that has scraped off the cake K continues to run as it is, and is again positioned opposite the oil hopper 2 to over-act on the grinding fluid U.

As described above, the grinding fluid over-treatment device according to the present invention runs the endless circulating cloth 6 and over-treats the grinding fluid U with this cloth 6.
This continuous overtreatment of the grinding fluid U can be achieved continuously, and all of these continuous overtreatment operations of the grinding fluid U can be accomplished automatically without requiring any human intervention.

In addition, since the cloth 6 is used repeatedly, there is almost no material cost that is consumed due to waste, which makes it more economical.

Furthermore, the grinding oil U discharged from the machine tool
Even if the degree of contamination of the grinding fluid U changes significantly, there is no risk of any inconvenience such as deterioration of the overaction of the cloth 6, and even if the degree of contamination of the grinding fluid U is extremely large, the Good overfunction can be maintained by simple operations such as slightly increasing the running speed.

Furthermore, overtreatment of the grinding fluid U can be successfully achieved over a long period of time without any manual effort.

As is clear from the above description, the grinding fluid overtreatment device according to the present invention can achieve overtreatment continuously over a long period of time, and since the cloth is used repeatedly, it is not consumed for overtreatment. There is almost no material cost, which makes it possible to achieve overtreatment extremely economically, and furthermore, it is possible to perform overtreatment for a long period of time without requiring any labor, and its overcapacity is stably demonstrated, among other things. It exhibits excellent effects.

[Brief explanation of drawings]

FIG. 1 is a simplified layout diagram showing a basic configuration example of the present invention. FIG. 2 is an exploded layout diagram showing the positional relationship between the cloth, the metal mesh, and the backup plate in the oil hopper section. Third
The figure is an enlarged view of the oil hopper section. Explanation of symbols, 1: Tank, 2: Oil hopper, 3: Hopper tank, 4: Metal mesh, 5: Backup plate, 6: Cloth, 7: Guide roller,
8: Vacuum hopper, 9: Pressure roller, 1
0: Drive roller, 11: Drive machine, 12: Scraper, 13: Suction pump, U: Grinding oil, K:
cake.

Claims (1)

[Claims] 1. A tank for storing grinding fluid discharged from a machine tool, and an endless circulating cloth that runs along a circulating path that has a running part located in the grinding fluid stored in the tank, and an oil hopper that is immersed in the grinding oil liquid in the tank, communicates the inside with the vacuum source, and is arranged to always close the upper end opening with the cloth, and the oil hopper Then, from the upstream side along the running direction of the cloth, a vacuum hopper that applies a vacuum effect from the same side as the oil hopper, a pressure roller that applies a pressing force, and metal powder and dirt attached to the cloth. A grinding fluid overtreatment device consisting of a scraper and a scraper that scrape off cakes of material.